CN105634702A

CN105634702A - Multi-user information co-channel sending method and device, and multi-user information co-channel receiving method and device

Info

Publication number: CN105634702A
Application number: CN201410719697.8A
Authority: CN
Inventors: 袁志锋; 戴建强; 胡留军
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2014-12-01
Filing date: 2014-12-01
Publication date: 2016-06-01
Anticipated expiration: 2034-12-01
Also published as: WO2016086834A1; CN105634702B

Abstract

The invention discloses a multi-user information co-channel sending method and device, and a multi-user information co-channel receiving method and device. The multi-user information co-channel sending method comprises following steps: dividing N users into K groups; generating L superposition symbols according to the modulation symbols of each piece of user information in each group, wherein the K, N and L are integers, the L is more than or equal to K, the K is more than or equal to 1, the N is more than or equal to 2, and the L is not equal to 1; separately carrying out spread spectrum extension on the L superposition symbols by using different sequences in L orthogonal sequences with lengths of L, thus obtaining L symbol sequences; combining the L symbol sequences, thus obtaining combined symbol sequences; and sending transmitting signals formed by the combined symbol sequences. Through the methods and the devices of the invention, the problem that during NOMA downlink sending, in an actual fading channel, the risk of error propagation is great if symbol-level SIC is performed in the demodulation process of the terminal, which causes performance degradation, is solved; and the access performance is improved.

Description

Multi-user information co-channel sending, receiving method and device thereof

Technical field

The present invention relates to the communications field, in particular to a kind of multi-user information co-channel sending, receiving method and device thereof.

Background technology

Multi-user information transmission orthogonal multiple access can be divided into access (OrthogonalMultipleAccess, OMA) by access way and non-orthogonal multiple accesses (Non-OrthogonalMultipleAccess, NOMA). In OMA mode, each user uses strictly mutually orthogonal " subchannel " to transmit, thus does not interfere between each user profile during demodulation. Relatively, in NOMA mode, the information of each user is in " whole passage " upper transmission, thus interferes between each user profile during demodulation. Multi-user information transmission has downlink transmission and two kinds of situations of ul transmissions. Descending it is also called broadcast, refers to transmitter and information is issued multiple receiver simultaneously. Relevant works shows that NOMA broadcast can obtain the power system capacity bigger than OMA broadcast, as shown in Figure 1, especially, NOMA mode can more preferably improve the capacity of Cell Edge User (edge customer relative centre user is more weak user), substantially keeps the considerable volume of central user (central user opposite edges user is stronger user) simultaneously.

For improving power system capacity, particularly improve the capacity of edge customer, descending can select non-orthogonal access way. The broadcast of nonopiate multi-user information co-channel refers to after the modulation symbol of different user information stacks up by transmitter, sends multiple receiver on identical running time-frequency resource to, and different user extracts the information of oneself from the composite signal received. The process that the modulation symbol of plurality of user profile stacks up is also called " supercomposed coding ". Owing to interfering between user profile each when NOMA mode demodulates, usual receiving terminal to do serial interference elimination (SuccessiveInterferenceCancellation, SIC) separate information. Briefly describing for the SIC process of two users below, the SIC process of multi-user is easy to thus promote: first go out the information of user 1 (more weak user) with the interference demodulation coding of user 2 (stronger user). Then during demodulation user's 2 information, it is necessary to first deduct after user 1 signal reconstruct out of demodulation coding before, then solve user 2 information. Such user 2 information is not because interfering with, so performance can have a distinct increment. Usual user 1 is edge customer, user centered by user 2.

Classical documents are it was demonstrated that adopt non-orthogonal multiple multiplexing can reach multi-user information capacity limitation in conjunction with code block level SIC technology. but owing to code block level SIC can cause significantly high implementation complexity, power consumption and time delay, terminal is unacceptable by sometimes, so terminal in the urgent need to simple symbol level SIC (without reconstructing user 1 symbol, realize simple but performance to damage), if awgn channel, it is symbol level SIC during terminal demodulation and also substantially can ensure that performance, but under actual fading channel, when the signal after supercomposed coding synthesizes is on the frequency band that deeply declines, these composite signals after deeply declining are symbol level SIC and have very big error propagation risk, thus causing that access performance declines.

Summary of the invention

The invention provides a kind of multi-user's co-channel, during at least to solve that NOMA is descending to be sent, under actual fading channel, terminal is symbol level SIC when demodulating and is had very big error propagation risk, thus causing that access performance declines this problem.

According to an aspect of the invention, it is provided a kind of multi-user information co-channel sending method, including: according to the modulation symbol of each user profile in each group in the N number of user being divided into K group, generating L superposition symbol, wherein, K, N, L are integer, and L >=K >=1, N >=2, L �� 1; L described superposition symbol is carried out spread spectrum extension by different sequences in the orthogonal sequence using L length to be L respectively, obtains L symbol sebolic addressing; Merge described L symbol sebolic addressing, obtain merging symbol sebolic addressing; Send the transmitting signal formed by described merging symbol sebolic addressing.

Preferably, according to the modulation symbol of each user profile in each group in the N number of user being divided into K group, generate L described superposition symbol to include: when K=1, it is determined that it is described superposition symbol at L the symbol that L moment superposition obtains that user organizes the modulation symbol of interior each user profile; When K >=2, it is determined that in K user's group, the modulation symbol of each user profile is described superposition symbol at L the symbol that a moment superposition obtains, wherein, L=K.

Preferably, when K >=2, it is determined that in K user's group, the modulation symbol of each user profile is that described superposition symbol includes: the number of users M in kth user's group at L the symbol that a moment superposition obtains_kWhen=1, it is determined that the modulation symbol of the single user information in described kth user's group is this group superposition symbol a moment; Number of users M in kth user's group_kWhen >=2, it is determined that the symbol after the modulation symbol superposition of the multi-user information in described kth user's group is this group superposition symbol a moment; Wherein, k=1,2 ..., K.

Preferably, the number of users M of the group that is divided in N number of user of K group kth user described in_kIt is 1 or 2 or 3; Wherein, k=1,2 ..., K.

Preferably, at M_kWhen >=2, the channel at each user place in kth user's group is differentiation.

Preferably, described superposition symbol likely constellation point composition planisphere be gray mappings.

Preferably, the number of users M in kth user's group_kWhen >=2, it is determined that the symbol after the modulation symbol superposition of the multi-user information in described kth user's group is the mode that this group superposition symbol a moment includes one below: to M in kth user's group_kThe modulation symbol of individual user profile carries out direct superposition; To M in kth user's group_kThe modulation symbol of individual user profile is optimized rear superposition.

Preferably, to M in kth user's group_kThe modulation symbol of individual user profile is optimized rear superposition and includes: the second complex symbol is carried out mirror image processing, obtains the symbol after mirror image, and wherein, described second complex symbol is M_kIn individual modulation symbol one, or be M_kThe symbol after two symbol superpositions in the modulation symbol of individual user profile; Being added with the symbol after described mirror image by first complex symbol, obtain described superposition symbol, wherein, described first complex symbol is M_kIn the modulation symbol of individual user profile one.

Preferably, it is x at described first complex symbol₁+y₁I, the second complex symbol is x₂+y_zWhen i, described superposition symbol is one below:

Or Wherein,Or For the symbol after described mirror image, X_std+Y_stdI is the not normalized integer lattice constellation symbol S corresponding with described first complex symbol_std,Represent and round downwards,Expression rounds up.

Preferably, corresponding for BPSK X_stdValue be 1 ,-1}, Y_stdTake zero; The X that QPSK is corresponding_std��Y_stdValue be 1 ,-1}; The X that 16QAM is corresponding_std��Y_stdValue be 1 ,-1,3 ,-3}; The X that 64QAM is corresponding_std��Y_stdValue be 1 ,-1,3 ,-3,5 ,-5,7 ,-7}.

Preferably, according to the modulation symbol being divided in each group in N number of user of K group each user profile, before generating L superposition symbol, described method also includes: to M in kth user's group_kIndividual user profile carries out Constellation optimization modulation, obtains kth user and organizes the modulation symbol of interior each user profile, wherein, k=1,2 ..., K.

Preferably, to M in kth user's group_kIndividual user profile carries out Constellation optimization modulation and includes: 60 degree of drift angle Diamond constellation modulation, or the modulation of triangle constellation, or the modulation of rectangle constellation.

Preferably, kth user organizes the modulation symbol of interior each user profile for distributing power P to unit power modulation symbol_mAfter symbol, wherein, P_mIt is represented to the power of the symbol distribution of user m in kth group; M=1,2 ..., M_k; P₁+P₂+��+P_Mk=P; P sends the transmitter of described transmitting signal to distribute to the general power of kth group user.

Preferably, the symbol sebolic addressing after described L extension disperses to place in running time-frequency resource.

Preferably, send the described transmitting signal formed by described merging symbol sebolic addressing and include: described merging symbol sebolic addressing is formed L and launches signal, and send described transmitting signal respectively by L antenna.

According to another aspect of the present invention, additionally provide a kind of multi-user information co-channel method of reseptance, including: the transmitting signal that receiver/transmitter sends, wherein said transmitting signal is: respectively according to the modulation symbol being divided in each group in N number of user of K group each user profile on described transmitter, generate L superposition symbol, wherein, K, N, L are integer, and L >=K >=1, N >=2, L �� 1; L described superposition symbol is carried out spread spectrum extension by different sequences in the orthogonal sequence using L length to be L respectively, obtains L symbol sebolic addressing; Merge L described symbol sebolic addressing, obtain merging symbol sebolic addressing the transmitting signal formed by described merging symbol sebolic addressing; Symbol sebolic addressing after carrying out channel equalization, after adopting the frequency expansion sequence corresponding with transmitting terminal to de-spread described merging; The described superposition symbol obtained after despreading is demodulated, obtains the user profile that this user is corresponding.

Preferably, this user place user organizes frequency expansion sequence and the transmitter of correspondence that this user's group carries out the frequency expansion sequence that spread spectrum extension uses is identical.

Preferably, to despreading after obtain described superposition symbol be demodulated, obtain user profile corresponding to this user and include the mode of one below: directly demodulate with the interference of other users; Or first solve the symbol of more weak user with the interference of other users, then isolate with symbol level SIC receive in signal described in the symbol of more weak user, do mirror image processing after the symbol of more weak user described in removal again, until solving the user profile of this user.

According to another aspect of the present invention, additionally provide a kind of multi-user information co-channel dispensing device, including: laminating module, for according to the modulation symbol being divided in each group in N number of user of K group each user profile, generating L superposition symbol, wherein, K, N, L are integer, and L >=K >=1, N >=2, L �� 1; Spread spectrum module, is used for the different sequences in the orthogonal sequence using L length to be L and respectively L described superposition symbol is carried out spread spectrum extension, obtain L symbol sebolic addressing; Merge module, be used for merging described L symbol sebolic addressing, obtain merging symbol sebolic addressing; Sending module, for sending the transmitting signal formed by described merging symbol sebolic addressing.

Preferably, described laminating module is used for: when K=1, it is determined that it is described superposition symbol at L the symbol that L moment superposition obtains that user organizes the modulation symbol of interior each user profile; When K >=2, it is determined that in K user's group, the modulation symbol of each user profile is described superposition symbol at L the symbol that a moment superposition obtains, wherein, L=K.

Preferably, described laminating module is additionally operable to: in K >=2, and the number of users M in kth user's group_kWhen=1, it is determined that the modulation symbol of the single user information in described kth user's group is this group superposition symbol a moment; In K >=2, and the number of users M in kth user's group_kWhen >=2, it is determined that the symbol after the modulation symbol superposition of the multi-user information in described kth user's group is this group superposition symbol a moment; Wherein, k=1,2 ..., K.

Preferably, described laminating module is additionally operable to: to M in kth user's group_kThe modulation symbol of individual user profile carries out direct supercomposed coding; Or to M in kth user's group_kThe modulation symbol of individual user profile is optimized rear supercomposed coding.

Preferably, described laminating module is additionally operable to: the second complex symbol is carried out mirror image processing, obtains the symbol after mirror image, and wherein, described second complex symbol is M_kIn individual modulation symbol one, or be M_kThe symbol after two symbol superpositions in the modulation symbol of individual user profile; Being added with the symbol after described mirror image by first complex symbol, obtain described superposition symbol, wherein, described first complex symbol is M_kIn the modulation symbol of individual user profile one.

Preferably, described device also includes: modulation module, for M in kth user's group_kIndividual user profile carries out Constellation optimization modulation, obtains kth user and organizes the modulation symbol of interior each user profile, wherein, k=1,2 ..., K.

Preferably, described modulation module is additionally operable to: user profile carries out 60 degree of drift angle Diamond constellation modulation or the modulation of triangle constellation or the modulation of rectangle constellation.

Preferably, described sending module is additionally operable to: described merging symbol sebolic addressing is formed L and launches signal, and send described transmitting signal respectively by L antenna.

According to another aspect of the present invention, additionally provide a kind of multi-user information co-channel and receive device, including receiver module, for the transmitting signal that receiver/transmitter sends, wherein said transmitting signal is: respectively according to the modulation symbol being divided in each group in N number of user of K group each user profile on described transmitter, generate L superposition symbol, wherein, K, N, L are integer, and L >=K >=1, N >=2, L �� 1; L described superposition symbol is carried out spread spectrum extension by different sequences in the orthogonal sequence using L length to be L respectively, obtains L symbol sebolic addressing; Merge L described symbol sebolic addressing, obtain merging symbol sebolic addressing the transmitting signal formed by described merging symbol sebolic addressing; Despreading module, after being used for carrying out channel equalization, adopts the symbol sebolic addressing after the frequency expansion sequence described merging of despreading corresponding with transmitting terminal; Demodulation module, for the described superposition symbol obtained after despreading is demodulated, obtains the user profile that this user is corresponding.

Preferably, described demodulation module is used for: directly demodulate with the interference of other users; Or first solve the symbol of more weak user with the interference of other users, then isolate with symbol level SIC receive in signal described in the symbol of more weak user, after the symbol of more weak user described in removing, do mirror image processing again, until solving the user profile of this user.

By the present invention, adopting according to the modulation symbol being divided in each group in N number of user of K group each user profile, generate L superposition symbol, wherein, K, N, L are integer, and L >=K >=1, N >=2, L �� 1; L superposition symbol is carried out spread spectrum extension by different sequences in the orthogonal sequence using L length to be L respectively, obtains L symbol sebolic addressing; Merge L symbol sebolic addressing, obtain merging symbol sebolic addressing; Send by merging the mode launching signal that symbol sebolic addressing is formed, when solving that NOMA is descending to be sent, under actual fading channel, terminal is symbol level SIC and is had very big error propagation risk when demodulating, thus cause the problem that access performance declines, thus improve access performance.

Accompanying drawing explanation

Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the application, and the schematic description and description of the present invention is used for explaining the present invention, is not intended that inappropriate limitation of the present invention. In the accompanying drawings:

Fig. 1 is the capacity comparison figure of the NOMA mode according to correlation technique and OMA mode;

Fig. 2 is the schematic flow sheet of multi-user information co-channel sending method according to embodiments of the present invention;

Fig. 3 is the schematic flow sheet of multi-user information co-channel method of reseptance according to embodiments of the present invention;

Fig. 4 is the structural representation of multi-user information co-channel dispensing device according to embodiments of the present invention;

Fig. 5 is the preferred structure schematic diagram of multi-user information co-channel dispensing device according to embodiments of the present invention;

Fig. 6 is the structural representation that multi-user information co-channel according to embodiments of the present invention receives device;

Fig. 7 is wireless broadcast communication system schematic according to the preferred embodiment of the invention;

Fig. 8 is the schematic diagram that N number of user is divided into K group according to the preferred embodiment of the invention;

Fig. 9 be according to the preferred embodiment of the invention multi-user information co-channel broadcast system at the processing procedure schematic diagram of transmitting terminal;

Figure 10 is that the single according to the preferred embodiment of the invention 8 long symbol sebolic addressings that merge disperse to place schematic diagram in running time-frequency resource;

Figure 11 be according to the preferred embodiment of the invention multi-user's modulation symbol at the processing procedure schematic diagram of base station;

Figure 12 generates schematic diagram according to user's modulation symbol in the preferred embodiment of the present invention one one group;

Figure 13 is according to the schematic diagram of two direct superpositions of QPSK symbol in the preferred embodiment of the present invention one one group;

Figure 14 is the schematic diagram of superposition after optimizing according to two QPSK symbols in the preferred embodiment of the present invention one one group;

Figure 15 is by the sign extended schematic diagram after one group of user's modulation symbol superposition according to a frequency expansion sequence in the preferred embodiment of the present invention one;

Figure 16 is the schematic diagram sent by 8 antennas according to 8 combinations symbol sebolic addressing in the preferred embodiment of the present invention one;

Figure 17 is the exemplary receiver structural representation of the multi-user information co-channel broadcast system according to the preferred embodiment of the present invention two.

Detailed description of the invention

In the multi-user information co-channel sending method of the NOMA downlink broadcast system that the embodiment of the present invention provides, transmitter is by after multiple user grouping, in group, multi-user is by the direct superposition of non-orthogonal manner or optimization stack, symbol after the superposition of different group uses the different sequences in orthogonal sequence set to carry out sign extended, all be expanded after symbol sebolic addressing merge after be sent to terminal, demodulate oneself information after terminal equilibrium despreading. Adopting the following example of the present invention, the signal to noise ratio (SNR) of the symbol after often organizing superposition after terminal despreading close to the situation of additive white Gaussian noise (AWGN), namely can at utmost ensure multiple access performance under descending fading channel.

Below with reference to accompanying drawing and describe the present invention in detail in conjunction with the embodiments. It should be noted that when not conflicting, the embodiment in the application and the feature in embodiment can be mutually combined. And, can perform in the computer system of such as one group of computer executable instructions in the step shown in the flow chart of accompanying drawing, and, although illustrate logical order in flow charts, but in some cases, it is possible to perform shown or described step with the order being different from herein.

Present embodiments providing the co-channel sending method of a kind of multi-user information, Fig. 2 is the flow chart of the co-channel sending method of multi-user information according to embodiments of the present invention, as in figure 2 it is shown, this flow process comprises the steps:

Step S202, according to the modulation symbol of each user profile in each group in the N number of user being divided into K group, generates L superposition symbol, and wherein, K, N, L are integer, and L >=K >=1, N >=2, L �� 1;

Step S204, L superposition symbol is carried out spread spectrum extension by different sequences in the orthogonal sequence using L length to be L respectively, obtains L symbol sebolic addressing;

Step S206, merges L symbol sebolic addressing, obtains merging symbol sebolic addressing;

Step S208, sends by merging the transmitting signal that symbol sebolic addressing is formed.

Pass through above-mentioned steps, by mode modulation symbol being overlapped and merge after spreading, solve NOMA descending send time, under actual fading channel, it is symbol level SIC during terminal demodulation and has very big error propagation risk, thus the problem causing access performance to decline, improve access performance.

Preferably, same user is according to the different moment, it is possible to generate the modulation symbol of multiple user profile; Similar, K user is at the modulation symbol that can not generate L user profile in the same time. So, in step S202, according to the modulation symbol of each user profile in each group in the N number of user being divided into K group, generate L superposition symbol and can adopt following manner: when K=1, it is determined that it is superposition symbol at L the symbol that L moment superposition obtains that user organizes the modulation symbol of interior each user profile. When K >=2, it is determined that in K user's group, the modulation symbol of each user profile is superposition symbol at L the symbol that a moment superposition obtains, wherein, L=K.

When above-mentioned K >=2, it is determined that in K user's group, the modulation symbol of each user profile is when L the symbol that a moment superposition obtains is superposition symbol, it is possible to generate superposition symbol according to the difference of user's number in user's group. Such as, the number of users M in kth user's group_kWhen=1, it is determined that the modulation symbol of the single user information in kth user's group is this group superposition symbol a moment; Number of users M in kth user's group_kWhen >=2, it is determined that the symbol after the modulation symbol superposition of the multi-user information in kth user's group is this group superposition symbol a moment; Wherein, k=1,2 ..., K.

Preferably, the number of users M of the group that is divided in N number of user of K group kth user_kIt is 1 or 2 or 3; Wherein, k=1,2 ..., K.

Preferably, superposition symbol likely constellation point composition planisphere be gray mappings.

Preferably, the mode being overlapped coding can have multiple, the coding after including but not limited to direct supercomposed coding or modulation symbol being optimized. Number of users M preferably, in step S202, in kth user's group_kWhen >=2, it is determined that the symbol after the modulation symbol superposition of the multi-user information in kth user's group is the mode that this group superposition symbol a moment includes one below: to M in kth user's group_kThe modulation symbol of individual user profile carries out direct supercomposed coding; Or, to M in kth user's group_kThe modulation symbol of individual user profile is optimized rear supercomposed coding.

Preferably, in step S202, to M in kth user's group_kThe modulation symbol of individual user profile carries out direct supercomposed coding and includes: using as the M of the modulation symbol of each user profile in kth user's group_kIndividual complex symbol is directly added, to obtain the superposition symbol of kth user group.

Preferably, in step S202, to M in kth user's group_kThe modulation symbol of individual user profile is optimized rear supercomposed coding and includes: the second complex symbol is carried out mirror image processing, obtains the symbol after mirror image, and wherein, the second complex symbol is M_kIn individual modulation symbol one, or be M_kThe symbol after two symbol superpositions in the modulation symbol of individual user profile; Being added with the symbol after mirror image by first complex symbol, obtain superposition symbol, wherein, the first complex symbol is M_kIn the modulation symbol of individual user profile one.

Preferably, being x1+y1 i at the first complex symbol, when the second complex symbol is x2+y2 i, superposition symbol is one below:

Or

Wherein,OrFor the symbol after mirror image, X_std+Y_stdI is the not normalized integer lattice constellation symbol S corresponding with the first complex symbol_std,Represent and round downwards,Expression rounds up.

Preferably, before step S202, when user profile is modulated, it is possible to adopt Different Modulations, for instance, to M in kth user's group_kIndividual user profile carries out Constellation optimization modulation, obtains kth user and organizes the modulation symbol of interior each user profile, wherein, k=1,2 ..., K. Wherein, to M in kth user's group_kIndividual user profile carries out Constellation optimization modulation and includes: 60 degree of drift angle Diamond constellation modulation, or the modulation of triangle constellation, or the modulation of rectangle constellation.

Preferably, kth user organizes the modulation symbol of interior each user profile for distributing power P to unit power modulation symbol_mAfter symbol, wherein, P_mIt is represented to the power of the symbol distribution of user m in kth group; M=1,2 ..., M_k; P₁+P₂+��+P_Mk=P; P is the general power that kth group user distributed to by the transmitter sending and launching signal.

Preferably, the symbol sebolic addressing after L extension disperses to place in running time-frequency resource.

Preferably, in step S208, symbol sebolic addressing will be merged and form L transmitting signal, and send transmitting signal respectively by L antenna.

The embodiment of the present invention additionally provides a kind of multi-user information co-channel method of reseptance, and Fig. 3 is the schematic flow sheet of multi-user information co-channel method of reseptance according to embodiments of the present invention, as it is shown on figure 3, this flow process comprises the steps:

Step S302, the transmitting signal that receiver/transmitter sends, wherein launching signal is: on the transmitter respectively according to the modulation symbol being divided in each group in N number of user of K group each user profile, generating L superposition symbol, wherein, K, N, L are integer, and L >=K >=1, N >=2, L �� 1; L superposition symbol is carried out spread spectrum extension by different sequences in the orthogonal sequence using L length to be L respectively, obtains L symbol sebolic addressing; L the symbol sebolic addressing merged, obtains merging symbol sebolic addressing, and by merging the transmitting signal that symbol sebolic addressing is formed;

Step S304, the symbol sebolic addressing after carrying out channel equalization, after adopting the frequency expansion sequence despreading corresponding with transmitting terminal to merge;

Step S306, is demodulated the superposition symbol obtained after despreading, obtains the user profile that this user is corresponding.

Preferably, in step S306, the superposition symbol obtained is demodulated, obtains user profile corresponding to this user and include the mode of one below: directly demodulate with the interference of other users after despreading; Or the first symbol solving more weak user with the interference of other users, then the symbol of the more weak user received in signal is isolated with symbol level SIC, after the symbol removing more weak user, do mirror image processing again, until solving the user profile of this user.

Additionally providing a kind of multi-user information co-channel dispensing device in the present embodiment, this device is used for realizing above-described embodiment and preferred implementation, has be carried out repeating no more of explanation. Additionally, term used below " module " can realize the software of predetermined function and/or the combination of hardware. Although the device described by following example preferably realizes with software, but hardware, or the realization of the combination of software and hardware is also likely to and is contemplated.

As shown in Figure 4, this device includes: laminating module 42, spread spectrum module 44, merging module 46 and sending module 48, wherein, laminating module 42, for according to the modulation symbol being divided in each group in N number of user of K group each user profile, generate L superposition symbol, wherein, K, N, L are integer, and L >=K >=1, N >=2, L �� 1; Spread spectrum module 44 coupled to laminating module 42, and L superposition symbol is carried out spread spectrum extension by different sequences respectively that be used in the orthogonal sequence using L length to be L, obtains L symbol sebolic addressing; Merge module 46 and coupled to spread spectrum module 44, be used for merging L symbol sebolic addressing, obtain merging symbol sebolic addressing; Sending module 48 coupled to merging module 46, for sending by merging the transmitting signal that symbol sebolic addressing is formed.

Preferably, laminating module 42 is used for: when K=1, it is determined that it is superposition symbol at L the symbol that L moment superposition obtains that user organizes the modulation symbol of interior each user profile. When K >=2, it is determined that in K user's group, the modulation symbol of each user profile is superposition symbol at L the symbol that a moment superposition obtains, wherein, L=K.

Preferably, laminating module 42 is additionally operable to: laminating module is additionally operable to: in K >=2, and the number of users M in kth user's group_kWhen=1, it is determined that the modulation symbol of the single user information in kth user's group is this group superposition symbol a moment; In K >=2, and the number of users M in kth user's group_kWhen >=2, it is determined that the symbol after the modulation symbol superposition of the multi-user information in kth user's group is this group superposition symbol a moment; Wherein, k=1,2 ..., K.

Preferably, laminating module 42 is additionally operable to: to M in kth user's group_kThe modulation symbol of individual user profile carries out direct supercomposed coding; Or to M in kth user's group_kThe modulation symbol of individual user profile is optimized rear supercomposed coding.

Preferably, laminating module 42 is additionally operable to: using as the M of the modulation symbol of each user profile in kth user's group_kIndividual complex symbol is directly added, to obtain the superposition symbol of kth user group.

Preferably, laminating module 42 is additionally operable to: the second complex symbol is carried out mirror image processing, obtains the symbol after mirror image, and wherein, the second complex symbol is M_kIn individual modulation symbol one, or be M_kThe symbol after two symbol superpositions in the modulation symbol of individual user profile; Being added with the symbol after mirror image by first complex symbol, obtain superposition symbol, wherein, the first complex symbol is M_kIn the modulation symbol of individual user profile one.

Or

Preferably, corresponding for BPSK X_stdValue be 1 ,-1}, Y_stdTake zero; The X that QPSK is corresponding_std��Y_stdValue be 1 ,-1}; Xstd, Ystd value corresponding for 16QAM be 1 ,-1,3 ,-3}; The X that 64QAM is corresponding_std��Y_stdValue be 1 ,-1,3 ,-3,5 ,-5,7 ,-7}.

Fig. 5 is the preferred structure schematic diagram of multi-user information co-channel dispensing device according to embodiments of the present invention, as shown in Figure 5, it is preferable that, device also includes: modulation module 52 coupled to laminating module 42, for M in kth user's group_kIndividual user profile carries out Constellation optimization modulation, obtains kth user and organizes the modulation symbol of interior each user profile, wherein, k=1,2 ..., K.

Preferably, modulation module 52 is additionally operable to: user profile carries out 60 degree of drift angle Diamond constellation modulation or the modulation of triangle constellation or the modulation of rectangle constellation.

Preferably, kth user organizes the modulation symbol of interior each user profile for distributing power P to unit power modulation symbol_mAfter symbol, wherein, P_mIt is represented to the power of the symbol distribution of user m in kth group; M=1,2 ..., M_k; P1+P2+ ...+P_Mk=P; P is that the general power of kth group user distributed to by the transmitter launching signal.

Preferably, sending module 48 is additionally operable to: will merge symbol sebolic addressing and form L transmitting signal, and send transmitting signal respectively by L antenna.

The present embodiment additionally provides a kind of multi-user information co-channel and receives device, Fig. 6 is the structural representation that multi-user information co-channel according to embodiments of the present invention receives device, as shown in Figure 6, this device includes: receiver module 62, despreading module 64 and demodulation module 66, wherein, receiver module 62, for the transmitting signal that receiver/transmitter sends, wherein launching signal is: on the transmitter according to the modulation symbol being divided in each group in N number of user of K group each user profile, generate L superposition symbol, wherein, K, N, L is integer, and L >=K >=1, N >=2, L �� 1, L superposition symbol is carried out spread spectrum extension by different sequences in the orthogonal sequence using L length to be L respectively, obtains L symbol sebolic addressing, merge L symbol sebolic addressing, obtain merging symbol sebolic addressing, and by merging the transmitting signal that symbol sebolic addressing is formed, despreading module 64 coupled to receiver module 62, the symbol sebolic addressing after being used for carrying out channel equalization, after adopting the frequency expansion sequence corresponding with transmitting terminal to de-spread merging, demodulation module 66 coupled to despreading module 64, for the superposition symbol obtained after despreading is demodulated, obtains the user profile that this user is corresponding.

Preferably, demodulation module 66 is used for: directly demodulate with the interference of other users; Or the first symbol solving more weak user with the interference of other users, then the symbol of the more weak user received in signal is isolated with symbol level SIC, after the symbol removing more weak user, do mirror image processing again, until solving the user profile of this user.

Illustrate below in conjunction with to the preferred embodiment of the present invention.

It should be noted that describe the method that K the user multi-user information co-channel when at a time obtaining the modulation symbol of K user profile respectively sends in the preferred embodiment. Those skilled in the art can according to the description in this preferred embodiment, when creative work need not be paid, understand K the user multi-user information co-channel delivery plan when multiple moment obtain the modulation symbol of L (L > K) individual user profile, will not be described in great detail at this.

The method that a kind of multi-user information co-channel provided in this preferred embodiment sends, comprises the steps:

Step 1, is divided into K group by N number of user, and often group can be the direct superposition of multi-user's modulation symbol or optimization stack generation first kind superposition symbol, it is also possible to is single user modulation symbol and Equations of The Second Kind superposition symbol. Wherein N is greater than being equal to the integer of 2, and K is greater than being equal to the integer of 1. The symbol constellation of first kind superposition symbol or Equations of The Second Kind superposition symbol is gray mappings.

Step 2, when K is be more than or equal to 2, using the different sequences in orthogonal sequence set that first kind superposition symbol or Equations of The Second Kind superposition symbol carry out spread spectrum extension process, generate the symbol sebolic addressing after extension, the symbol sebolic addressing merging after K group being extended obtains the first kind and merges symbol sebolic addressing. When K is 1, it is organized, by user, the merging symbol sebolic addressing that the modulation symbol of interior each user profile is overlapped at L the symbol that L moment superposition obtains and merges after spread spectrum extension that Equations of The Second Kind merges symbol sebolic addressing.

Step 3, the first kind is merged symbol sebolic addressing with transmitter or Equations of The Second Kind merges symbol sebolic addressing and forms multi-antenna transmission signal, multiple antennas be sent to receiver.

Preferably, N number of user is divided into K group, the number of users M often organized_kCan be 1 or 2 or 3, M_kWhen being not 1, in same group, each user place channel is differentiation.

Preferably, first kind superposition symbol, the symbol that in group, the direct superposition of each user's modulation symbol generates, or each user profile in group is adopted optimization constellation modulation, or after in group, the modulation symbol of each user profile does optimization process, the symbol that superposition generates, the symbol constellation after superposition is gray mappings.

Preferably, user's modulation symbol, is distribute the symbol after certain power to unit power modulation symbol. Power P is distributed to the modulation symbol of user m_m, wherein m=1,2 ..., M_k, M_kCan be 1 or 2 or 3, P₁+P₂+ ... +=P, P are the general power that this group user given by transmitter.

In the examples below that, making the first complex symbol is x1+y1 i, and the second complex symbol is x2+y2 i.

Preferably, when modulating user profile, adopt and optimize constellation modulation, include but not limited to that 60 degree of drift angle Rhombic modulations, triangle constellation are modulated; Optimization process therein can refer to, the second complex symbol carries out mirror image processing, obtains the symbol after mirror image, is overlapped by the symbol after the first complex symbol and mirror image, generates first kind superposition symbol. The superposition symbol obtained after superposition likely constellation point composition planisphere be gray mappings. Additionally, optimization process can also refer to, the first complex symbol and the second complex symbol are mapped to superposition after optimal constellation shape, the superposition symbol obtained after superposition the planisphere of likely constellation point composition be gray mappings.

Preferably, being superposed with the symbol after mirror image by the first complex symbol, the first kind superposition symbol of generation includes one below:

Symbol after superposition is

Wherein,OrFor the symbol after mirror image, X_std+Y_stdI is the not normalized integer lattice constellation symbol corresponding with the first complex symbol,Represent and round downwards,Expression rounds up.

Wherein, non-normalization integer lattice constellation symbol S_stdFor X_std+Y_stdI, X as corresponding in BPSK_stdValue be 1 ,-1}, Y_stdTake zero, X as corresponding in QPSK_std��Y_stdValue be 1 ,-1}; The X that 16QAM is corresponding_std��Y_stdValue be 1 ,-1,3 ,-3}; The X that 64QAM is corresponding_std��Y_stdValue be 1 ,-1,3 ,-3,5 ,-5,7 ,-7}.

Preferably, when K is greater than the integer being equal to 2, the orthogonal sequence set of K �� K has the sequence of K K length, every mutual strict orthogonal of sequence a, it is possible to sign extended is become the sequence of a K length.

Adopting in manner just described, often a sequence in the symbol orthogonal sequence set after group superposition carries out spread spectrum extension process, generates the symbol sebolic addressing after extension. Preferably, the frequency expansion sequence often organizing use is all different, and the symbol sebolic addressing after each superposition sign extended disperses to place in running time-frequency resource.

Preferably, when K is greater than the integer being equal to 2, the symbol sebolic addressing after K group being extended merges, and obtains the first kind and merges symbol sebolic addressing. Wherein, owing to have employed mutually orthogonal frequency expansion sequence, the symbol after the K group extension combined, mutually orthogonal, it does not have to interfere with each other.

Preferably, when K is greater than the integer being equal to 2, transmitter merges symbol sebolic addressing the first kind and forms K transmitting signal, is sent to receiver by K antenna respectively.

Corresponding to above-mentioned sending method, additionally provide a kind of method that multi-user information co-channel receives in the preferred embodiment, comprise the steps:

Step 1, receives the transmitting signal coming from transmitter, wherein, launches the transmitter that signal is above-mentioned and adopts above-mentioned multi-user information co-channel sending method to generate.

Step 2, each user's group does channel equalization, then de-spreads with the frequency expansion sequence of oneself, and then in group, user demodulates user profile by respective corresponded manner.

Preferably, user's group is one of which user in K group user, and K is greater than being equal to the integer of 2. Each user's group does channel equalization, then de-spreads with the frequency expansion sequence of oneself. The frequency expansion sequence that each user organizes employing is the same with each group of frequency expansion sequence at transmitter.

Preferably, in each group, user demodulates by respective corresponded manner: such as, user directly demodulates with the interference of other users. Or, user first solves the symbol of more weak user with the interference of other users, then with the symbol that symbol level SIC isolates the more weak user received in signal, does mirror image processing again, solve the symbol of this user after removing the symbol of more weak user.

Below in conjunction with accompanying drawing, embodiments of the invention are described in detail.

Present invention preferably provides a kind of multi-user information co-channel sending and receiving methods. Fig. 7 represent a kind of according to and the wireless broadcast communication system that uses the method for the present invention to implement. Multi-user information is transferred to multiple subscriber equipment (having UE1 to UE16 to have 16 subscriber equipmenies altogether in Fig. 7) by base station, each user from receive signal extraction oneself information. By user position, user can being divided into edge customer, central user and other users, the channel between this three classes user and base station is differentiation.

User N number of in community is divided into K group, and wherein N and K is greater than being equal to the integer of 2, the number of users M often organized_kCan be 1 or 2 or 3, M_kWhen being not 1, in same group, each user place channel is differentiation. Fig. 8 is the schematic diagram that N number of user is divided into K group. 1st group has M₁Individual user, K group has M_KIndividual user, M_kGenerally take 1,2,3. Such as M_kThis group only 1 user when being 1. Such as M_kWhen being 2, this group has 1 near-end user and 1 remote subscriber. Such as M_kWhen being 3, this group has 1 near-end user, 1 remote subscriber and 1 other user. All numbers of users of K group are N.

The symbol after superposition will be generated after often organizing the modulation symbol supercomposed coding of interior all user profile. Use the different sequences in the orthogonal sequence set (being the orthogonal sequence of K including K bar length) of K �� K that the symbol after often organizing superposition carries out spread spectrum extension process, generate the symbol sebolic addressing after extension. Transmitter forms the symbol sebolic addressing after extension launches signal, is sent to receiver. It is the multi-user information co-channel broadcast system processing procedure at transmitting terminal as shown in Figure 9.

Detailed process is, after the coded modulation symbol of all user profile distributes certain power in one group, and direct superposition or superposition after optimizing, generate the symbol after superposition. Power P is distributed to user's m symbol_m, wherein m=1,2 ..., Mk. P₁+P₂+ ... +=P, P are the general power that this group user given by transmitter. If user 1 grows from weak to strong to user Mk and sorts successively, then the user power relations of distribution are,

In one group, the first complex symbol is expressed as x1+y1 i, the second complex symbol, is expressed as x2+y2 i. Direct superposition refers to, the first complex symbol and the second complex symbol are directly added the symbol after generating superposition.

Wherein, after optimization, superposition refers to, the second complex symbol carries out mirror image processing, obtains the symbol after mirror image, the symbol after the first complex symbol and mirror image is overlapped coded treatment, generates the symbol after superposition. Symbol after superposition likely constellation point composition planisphere be gray mappings.

First complex symbol is superposed with the symbol after mirror image, generates the symbol after superposition and include one below:

Symbol after superposition isSymbol after superposition isWherein, OrFor the symbol after mirror image, X_std+Y_stdI is the not normalized integer lattice constellation symbol corresponding with the first complex symbol,Represent and round downwards,Expression rounds up.

Non-normalization integer lattice constellation symbol S_stdFor X_std+Y_stdI, X as corresponding in BPSK_stdValue be 1 ,-1}, Y_stdTake zero, X as corresponding in QPSK_std, Ystd value be 1 ,-1}; The X that 16QAM is corresponding_std, Ystd value be 1 ,-1,3 ,-3}; The X that 64QAM is corresponding_std��Y_stdValue be 1 ,-1,3 ,-3,5 ,-5,7 ,-7}.

After K group supercomposed coding completes, often a sequence in the symbol orthogonal sequence set after group superposition carries out spread spectrum extension process, generates the symbol sebolic addressing after extension. Wherein often organize the frequency expansion sequence symbol sebolic addressing from K K length in the orthogonal sequence set of K �� K of use, every mutual strict orthogonal of sequence a, it is possible to sign extended is become the sequence of a K length. The frequency expansion sequence often organizing use is all different, and the symbol sebolic addressing after each superposition sign extended disperses to place in running time-frequency resource.

Merging the symbol sebolic addressing after each group of superposition sign extended and form the symbol sebolic addressing after merging, extension can be DSSS, it is also possible to be frequency hop sequences spread spectrum. Symbol after the K group extension combined, mutually orthogonal, it does not have to interfere with each other.

Last transmitter forms K the symbol sebolic addressing after merging and launches signal, is sent to N number of user by K antenna respectively, launches signal and disperses to place in running time-frequency resource, and as shown in Figure 10, the merging symbol sebolic addressing of one 8 length is dispersed in running time-frequency resource.

Embodiment one

For emphasizing the characteristic in the present invention, below preferably a pair embodiment of the present invention of representative instance be described further.

Community one has 16 users, and these 16 users are divided into 8 groups by base station, and wherein often group has two users, respectively 1 edge customer, 1 central user. Channel between edge customer and central user and base station is differentiation.

The symbol after superposition will be generated after often organizing the modulation symbol supercomposed coding of interior all user profile. Use the different sequences in the orthogonal sequence set of 8 �� 8 that the symbol after often organizing superposition carries out spread spectrum extension process, generate the symbol sebolic addressing after extension, merge the symbol sebolic addressing after the symbol sebolic addressing after 8 groups of extensions is merged. Base station forms the symbol sebolic addressing after merging launches signal, is sent to 16 user terminals. It is multi-user's modulation symbol processing procedure in base station as shown in figure 11.

Detailed process is, by all user profile coded modulation in a group, and distributes certain power, generates user's modulation symbol with certain power. It is that in one group, user's modulation symbol generates schematic diagram as shown in figure 12.

First, edge customer flow of information and central user flow of information A1, A2 are obtained respectively through Turbo coding by double; two message bit stream I1, I2, base station is according to the channel situation between it and terminal UE, edge customer flow of information and central user flow of information A1, A2 are modulated to the symbol of unit power, then give edge customer symbol distribution power P₁Obtain the modulation symbol S having certain power₁, distribute power P to central user symbol₂Obtain the modulation symbol S having certain power₂. Wherein P₁+P₂=P, and P₁>P₂, P is the general power that reorganization user is given in base station.

Then, S₁And S₂Superposition after direct superposition or optimization, generates the symbol after superposition. Assume S₁For x1+_y1 i, S₂For x2+_y2 i, including S₁Power more than S₂Power. Directly it is superposed to: S₁+S₂, it is also possible to it is expressed as x1+_y1��i+x2+_y2 i. It is the schematic diagram of two direct superpositions of QPSK symbol as shown in figure 13.

It is superposed to after optimization: complex symbol S₁With complex symbol S₂The direct superposition of symbol S after mirror image, the complex symbol S after direct superposition₃It is represented by (S₁+ S), it is also possible to it is expressed as It is also denoted asWherein,OrFor symbol S, X after mirror image_std+Y_stdI is the not normalized integer lattice constellation symbol corresponding with the first complex symbol, X as corresponding in QPSK_std��Y_stdValue be 1 ,-1},Represent and round downwards,Expression rounds up. It is the schematic diagram of superposition after two QPSK symbols optimize as shown in figure 14.

After 8 groups of respective supercomposed codings complete, often a sequence in the symbol orthogonal sequence set after group superposition carries out spread spectrum extension process, generates the symbol sebolic addressing after extension. Wherein often organize the frequency expansion sequence sequence from 88 length in the frequency expansion sequence set of 8 �� 8 of use, every mutual strict orthogonal of sequence a, it is possible to modulation symbol is extended to the symbol sebolic addressing of one 8 length. The frequency expansion sequence often organizing use is all different, and as the 1st group uses frequency expansion sequence C1 extension, the 8th group uses frequency expansion sequence C8 extension, and the symbol sebolic addressing after each superposition sign extended disperses to place in running time-frequency resource. Figure 15 represents that a frequency expansion sequence is by the sign extended schematic diagram after one group of user's modulation symbol superposition.

Merge the symbol sebolic addressing after 8 groups of superposition sign extended, the symbol sebolic addressing after being merged. Symbol sebolic addressing after each extension disperses to place in running time-frequency resource. Extension can be DSSS, it is also possible to be frequency hop sequences spread spectrum.

Symbol sebolic addressing after merging is formed 8 and launches signals by last base station, is sent to 16, community user by 8 antennas respectively, as shown in figure 16.

Embodiment two

Figure 17 represents the exemplary receiver structural representation of the multi-user information co-channel broadcast system of the preferred embodiment of the present invention two. As shown in figure 17,1st group of user 1 receives the transmitting signal coming from transmitter, wherein, launching signal is that base station uses frequency expansion sequence C1 that the symbol after the modulation symbol supercomposed coding of the 1st group of user profile is carried out spread processing, generate symbol sebolic addressing after extending, symbol sebolic addressing after the merging that the symbol sebolic addressing merging after extending all groups obtains.

User 1 does channel equalization, then de-spreads with frequency expansion sequence C1, obtains the information of symbol after corresponding 1st group of user's superposition, then demodulates user profile by its corresponded manner. If user 1 is more weak user, then directly with the interference demodulating and decoding of other user symbols, obtain user 1 information; If user 1 is stronger user, then first solves the symbol of more weak user with the interference of other users, then with the symbol that symbol level SIC isolates the more weak user received in signal, do mirror image processing again after removing the symbol of more weak user, solve this user symbol.

If symbol level SIC to received signal in the symbol of more weak user be removed after the symbol that obtains be x2 '+y2 ' i, then do mirror image processing and be represented byOrWherein X_std��+Y_std' i is the not normalized integer lattice constellation symbol of the more weak user symbol first solved, X as corresponding in QPSK_std��Y_stdValue be 1 ,-1},Represent and round downwards,Expression rounds up.

Obviously, those skilled in the art should be understood that, each module of the above-mentioned present invention or each step can realize with general calculation element, they can concentrate on single calculation element, or it is distributed on the network that multiple calculation element forms, alternatively, they can realize with the executable program code of calculation element, thus, can be stored in storage device is performed by calculation element, and in some cases, shown or described step can be performed with the order being different from herein, or they are fabricated to respectively each integrated circuit modules, or the multiple modules in them or step are fabricated to single integrated circuit module realize. so, the present invention is not restricted to the combination of any specific hardware and software.

These are only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations. All within the spirit and principles in the present invention, any amendment of making, equivalent replacement, improvement etc., should be included within protection scope of the present invention.

Claims

1. a multi-user information co-channel sending method, it is characterised in that including:

According to the modulation symbol of each user profile in each group in the N number of user being divided into K group, generating L superposition symbol, wherein, K, N, L are integer, and L >=K >=1, N >=2, L �� 1;

L described superposition symbol is carried out spread spectrum extension by different sequences in the orthogonal sequence using L length to be L respectively, obtains L symbol sebolic addressing;

Merge described L symbol sebolic addressing, obtain merging symbol sebolic addressing;

Send the transmitting signal formed by described merging symbol sebolic addressing.

2. method according to claim 1, it is characterised in that according to the modulation symbol of each user profile in each group in the N number of user being divided into K group, generates L described superposition symbol and includes:

When K=1, it is determined that it is described superposition symbol at L the symbol that L moment superposition obtains that user organizes the modulation symbol of interior each user profile;

When K >=2, it is determined that in K user's group, the modulation symbol of each user profile is described superposition symbol at L the symbol that a moment superposition obtains, wherein, L=K.

3. method according to claim 2, it is characterised in that when K >=2, it is determined that in K user's group, the modulation symbol of each user profile is that described superposition symbol includes at L the symbol that a moment superposition obtains:

Number of users M in kth user's group_kWhen=1, it is determined that the modulation symbol of the single user information in described kth user's group is this group superposition symbol a moment;

Number of users M in kth user's group_kWhen >=2, it is determined that the symbol after the modulation symbol superposition of the multi-user information in described kth user's group is this group superposition symbol a moment; Wherein, k=1,2 ..., K.

4. method according to claim 1, it is characterised in that described in the number of users M of the group that is divided in N number of user of K group kth user_kIt is 1 or 2 or 3; Wherein, k=1,2 ..., K.

5. method according to claim 4, it is characterised in that at M_kWhen >=2, the channel at each user place in kth user's group is differentiation.

6. method according to claim 1, it is characterised in that described superposition symbol likely constellation point composition planisphere be gray mappings.

7. method according to claim 3, it is characterised in that the number of users M in kth user's group_kWhen >=2, it is determined that the symbol after the modulation symbol superposition of the multi-user information in described kth user's group is the mode that this group superposition symbol a moment includes one below:

To M in kth user's group_kThe modulation symbol of individual user profile carries out direct superposition;

To M in kth user's group_kThe modulation symbol of individual user profile is optimized rear superposition.

8. method according to claim 7, it is characterised in that to M in kth user's group_kThe modulation symbol of individual user profile is optimized rear superposition and includes:

Second complex symbol being carried out mirror image processing, obtains the symbol after mirror image, wherein, described second complex symbol is M_kIn individual modulation symbol one, or be M_kThe symbol after two symbol superpositions in the modulation symbol of individual user profile;

Being added with the symbol after described mirror image by first complex symbol, obtain described superposition symbol, wherein, described first complex symbol is M_kIn the modulation symbol of individual user profile one.

9. method according to claim 8, it is characterised in that be x at described first complex symbol₁+y₁I, the second complex symbol is x₂+y₂When i, described superposition symbol is one below:

Or

Wherein,OrFor the symbol after described mirror image, X_std+Y_stdI is the not normalized integer lattice constellation symbol S corresponding with described first complex symbol_std,Represent and round downwards,Expression rounds up.

10. method according to claim 9, it is characterised in that

The X that BPSK is corresponding_stdValue be 1 ,-1}, Y_stdTake zero;

The X that QPSK is corresponding_std��Y_stdValue be 1 ,-1};

The X that 16QAM is corresponding_std��Y_stdValue be 1 ,-1,3 ,-3};

The X that 64QAM is corresponding_std��Y_stdValue be 1 ,-1,3 ,-3,5 ,-5,7 ,-7}.

11. method according to claim 1, it is characterised in that according to the modulation symbol being divided in each group in N number of user of K group each user profile, before generating L superposition symbol, described method also includes:

To M in kth user's group_kIndividual user profile carries out Constellation optimization modulation, obtains kth user and organizes the modulation symbol of interior each user profile, wherein, k=1,2 ..., K.

12. method according to claim 11, it is characterised in that to M in kth user's group_kIndividual user profile carries out Constellation optimization modulation and includes:

60 degree of drift angle Diamond constellation modulation, or the modulation of triangle constellation, or the modulation of rectangle constellation.

13. method according to claim 2, it is characterised in that

Kth user organizes the modulation symbol of interior each user profile for distributing power P to unit power modulation symbol_mAfter symbol, wherein, P_mIt is represented to the power of the symbol distribution of user m in kth group; M=1,2 ..., M_k; P₁+P₂+��+P_Mk=P; P sends the transmitter of described transmitting signal to distribute to the general power of kth group user.

14. the method according to any one of claim 1 to 13, it is characterised in that the symbol sebolic addressing after described L extension disperses to place in running time-frequency resource.

15. method according to claim 14, it is characterised in that send the described transmitting signal formed by described merging symbol sebolic addressing and include:

Described merging symbol sebolic addressing is formed L and launches signal, and send described transmitting signal respectively by L antenna.

16. a multi-user information co-channel method of reseptance, it is characterised in that including:

The transmitting signal that receiver/transmitter sends, wherein said transmitting signal is: respectively according to the modulation symbol being divided in each group in N number of user of K group each user profile on described transmitter, generate L superposition symbol, wherein, K, N, L are integer, and L >=K >=1, N >=2, L �� 1; L described superposition symbol is carried out spread spectrum extension by different sequences in the orthogonal sequence using L length to be L respectively, obtains L symbol sebolic addressing; Merge L described symbol sebolic addressing, obtain merging symbol sebolic addressing the transmitting signal formed by described merging symbol sebolic addressing;

Symbol sebolic addressing after carrying out channel equalization, after adopting the frequency expansion sequence corresponding with transmitting terminal to de-spread described merging;

The described superposition symbol obtained after despreading is demodulated, obtains the user profile that this user is corresponding.

17. method according to claim 16, it is characterised in that

This user place user organizes frequency expansion sequence and the transmitter of correspondence, and that this user's group carries out the frequency expansion sequence that spread spectrum extension uses is identical.

18. the method according to claim 16 or 17, it is characterised in that to despreading after obtain described superposition symbol be demodulated, obtain user profile corresponding to this user and include the mode of one below:

Directly demodulate with the interference of other users; Or

First solve the symbol of more weak user with the interference of other users, then isolate with symbol level SIC receive in signal described in the symbol of more weak user, do mirror image processing after the symbol of more weak user described in removal again, until solving the user profile of this user.

19. a multi-user information co-channel dispensing device, it is characterised in that including:

Laminating module, for according to the modulation symbol being divided in each group in N number of user of K group each user profile, generating L superposition symbol, wherein, K, N, L are integer, and L >=K >=1, N >=2, L �� 1;

Spread spectrum module, is used for the different sequences in the orthogonal sequence using L length to be L and respectively L described superposition symbol is carried out spread spectrum extension, obtain L symbol sebolic addressing;

Merge module, be used for merging described L symbol sebolic addressing, obtain merging symbol sebolic addressing;

Sending module, for sending the transmitting signal formed by described merging symbol sebolic addressing.

20. device according to claim 19, it is characterised in that described laminating module is used for:

21. device according to claim 20, it is characterised in that described laminating module is additionally operable to:

In K >=2, and the number of users M in kth user's group_kWhen=1, it is determined that the modulation symbol of the single user information in described kth user's group is this group superposition symbol a moment;

In K >=2, and the number of users M in kth user's group_kWhen >=2, it is determined that the symbol after the modulation symbol superposition of the multi-user information in described kth user's group is this group superposition symbol a moment; Wherein, k=1,2 ..., K.

22. device according to claim 21, it is characterised in that described laminating module is additionally operable to:

To M in kth user's group_kThe modulation symbol of individual user profile carries out direct supercomposed coding; Or

To M in kth user's group_kThe modulation symbol of individual user profile is optimized rear supercomposed coding.

23. device according to claim 22, it is characterised in that described laminating module is additionally operable to:

24. device according to claim 19, it is characterised in that described device also includes:

Modulation module, for M in kth user's group_kIndividual user profile carries out Constellation optimization modulation, obtains kth user and organizes the modulation symbol of interior each user profile, wherein, k=1,2 ..., K.

25. device according to claim 24, it is characterised in that described modulation module is additionally operable to:

User profile is carried out 60 degree of drift angle Diamond constellation modulation or the modulation of triangle constellation or the modulation of rectangle constellation.

26. the device according to any one of claim 19 to 25, it is characterised in that the symbol sebolic addressing after described L extension disperses to place in running time-frequency resource.

27. device according to claim 26, it is characterised in that described sending module is additionally operable to:

28. a multi-user information co-channel receives device, it is characterised in that including:

Receiver module, for the transmitting signal that receiver/transmitter sends, wherein said transmitting signal is: respectively according to the modulation symbol being divided in each group in N number of user of K group each user profile on described transmitter, generate L superposition symbol, wherein, K, N, L are integer, and L >=K >=1, N >=2, L �� 1; L described superposition symbol is carried out spread spectrum extension by different sequences in the orthogonal sequence using L length to be L respectively, obtains L symbol sebolic addressing; Merge L described symbol sebolic addressing, obtain merging symbol sebolic addressing the transmitting signal formed by described merging symbol sebolic addressing;

Despreading module, after being used for carrying out channel equalization, adopts the symbol sebolic addressing after the frequency expansion sequence described merging of despreading corresponding with transmitting terminal;

Demodulation module, for the described superposition symbol obtained after despreading is demodulated, obtains the user profile that this user is corresponding.

29. device according to claim 28, it is characterised in that this user place user organizes frequency expansion sequence and the transmitter of correspondence, and that this user's group carries out the frequency expansion sequence that spread spectrum extension uses is identical.

30. the device according to claim 28 or 29, it is characterised in that described demodulation module is used for:

Directly demodulate with the interference of other users; Or

First solve the symbol of more weak user with the interference of other users, then isolate with symbol level SIC receive in signal described in the symbol of more weak user, after the symbol of more weak user described in removing, do mirror image processing again, until solving the user profile of this user.